Belimo SRF24A-SR-S2-5O - rotary actuator for valves

Belimo SRF24A-SR-S2-5O rotary actuator

Modulating actuator with a safety function, designed for ball valves and butterfly valves. During operation, the analogue Y signal sets the valve to its operating position while tensioning the return spring. If the power supply is interrupted, the spring moves the valve to the safety position: open (NO).

Key technical data

• Motor and safety function torque: 20 Nm.
• Rated voltage: AC/DC 24 V; frequency: 50/60 Hz.
• Rated voltage range: AC 19.2...28.8 V / DC 21.6...28.8 V.
• Modulating control: 2...10 V; position feedback signal: 2...10 V.
• Power consumption during operation: 5.5 W; at rest: 3 W; for cable sizing: 8.5 VA.
• Motor running time: 90 s / 90°; safety function operating time: <20 s @ -20...50°C, <60 s @ -30°C.
• Two integrated auxiliary switches: 2x SPDT, 1x 10% / 1x 11...100%.
• Manual override by crank with locking switch; mechanical position indicator and adjustable rotation angle with mechanical stops.
• F05 connection flange; IP54 protection rating.
• Ambient temperature: -30...50°C.

The device is intended for stationary heating, ventilation and air conditioning installations. Direct mounting on a rotary valve or butterfly valve with a mounting flange allows the orientation to be selected in 90° increments.